<template>
  <HomePanel title="热门品牌" sub-title="国际经典 品质保证">
    <template #right>
      <a href="javascript:;" class="iconfont icon-angle-left prev" @click="toggle(-1)"
        :class="{ disabled: index === 0}"></a>
      <a href="javascript:;" class="iconfont icon-angle-right next" @click="toggle(1)"
        :class="{ disabled: index === 1}"></a>
    </template>
    <div class="box" ref="target">
      <transition name="fade">
        <ul v-if="brands.length" class="list" :style="{ transform: `translateX(${-index * 1240}px)` }">
        <li v-for="item in brands" :key="item.id">
          <router-link to="/">
            <img :src="item.picture" alt="">
          </router-link>
        </li>
      </ul>
      <div v-else class="skeleton">
        <XtxSkeleton class="item" v-for="i in 5" :key="i" animated bg="#e4e4e4" width="240px" height="305px" />
      </div>
      </transition>
    </div>
  </HomePanel>
</template>

<script>
import { ref } from 'vue'
import HomePanel from './HomePanel'
import { findBrandAPI } from '@/api/home'
import { uselazyloadData } from '@/hooks'

export default {
  name: 'HomeBrand',
  components: {
    HomePanel
  },

  setup () {
    // const brands = ref([])

    // 获取品牌数据
    /* findBrandAPI(10).then(data => {
      brands.value = data.result
    }) */

    // 传递方法 () => findBrandAPI(10)
    const { result, target } = uselazyloadData(() => findBrandAPI(10))

    const index = ref(0)
    // 切换效果
    // 点击上一页，点击下一页 默认只有0,1
    function toggle (val) {
      const newIndex = index.value + val
      if (newIndex < 0 || newIndex > 1) {
        return
      }
      index.value = newIndex
    }

    return {
      brands: result, toggle, index, target
    }
  }
}
</script>

<style scoped lang='less'>
.skeleton {
  width: 100%;
  display: flex;

  .item {
    margin-right: 10px;

    &:nth-child(5n) {
      margin-right: 0;
    }
  }
}

.home-panel {
  background: #f5f5f5
}

.iconfont {
  width: 20px;
  height: 20px;
  background: #ccc;
  color: #fff;
  display: inline-block;
  text-align: center;
  margin-left: 5px;
  background: @xtxColor;

  &::before {
    font-size: 12px;
    position: relative;
    top: -2px
  }

  &.disabled {
    background: #ccc;
    cursor: not-allowed;
  }
}

.box {
  display: flex;
  width: 100%;
  height: 345px;
  overflow: hidden;
  padding-bottom: 40px;

  .list {
    width: 200%;
    display: flex;
    transition: all 1s;

    li {
      margin-right: 10px;
      width: 240px;

      &:nth-child(5n) {
        margin-right: 0;
      }

      img {
        width: 240px;
        height: 305px;
      }
    }
  }
}
</style>
